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/*-
* Copyright (c) 1995-1998 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
#include <i386/isa/isa.h>
#include <saver.h>
MOD_MISC(blank_saver);
static void
blank_saver(int blank)
{
u_char val;
if (blank) {
scrn_blanked = 1;
switch (crtc_type) {
case KD_VGA:
outb(TSIDX, 0x01); val = inb(TSREG);
outb(TSIDX, 0x01); outb(TSREG, val | 0x20);
break;
case KD_EGA:
/* not yet done XXX */
break;
case KD_CGA:
outb(crtc_addr + 4, 0x25);
break;
case KD_MONO:
case KD_HERCULES:
outb(crtc_addr + 4, 0x21);
break;
default:
break;
}
}
else {
switch (crtc_type) {
case KD_VGA:
outb(TSIDX, 0x01); val = inb(TSREG);
outb(TSIDX, 0x01); outb(TSREG, val & 0xDF);
break;
case KD_EGA:
/* not yet done XXX */
break;
case KD_CGA:
outb(crtc_addr + 4, 0x2d);
break;
case KD_MONO:
case KD_HERCULES:
outb(crtc_addr + 4, 0x29);
break;
default:
break;
}
scrn_blanked = 0;
}
}
static int
blank_saver_load(struct lkm_table *lkmtp, int cmd)
{
switch (crtc_type) {
case KD_MONO:
case KD_HERCULES:
case KD_CGA:
case KD_VGA:
break;
case KD_EGA:
/* EGA is yet to be supported */
default:
return ENODEV;
}
return add_scrn_saver(blank_saver);
}
static int
blank_saver_unload(struct lkm_table *lkmtp, int cmd)
{
return remove_scrn_saver(blank_saver);
}
int
blank_saver_mod(struct lkm_table *lkmtp, int cmd, int ver)
{
MOD_DISPATCH(blank_saver, lkmtp, cmd, ver,
blank_saver_load, blank_saver_unload, lkm_nullcmd);
}
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